Endless Sphere

Hi, First, could you post some pics of the scooter? It will help a lot giving more accurate answers. From the data you gave us, I'd say you'll be just fine using this 37A controller, given the fact that your battery is a 37Ah one, that gives a C rating of around 1C which is really not much even if y...

8,000 watt QS Hub 80 amp Greentime controller (not installed yet) Whuuuuutt??? Man, you have a 8000W QS motor, why would you install such a puny controller? You can go crazy with this motor, it can take up to 1000A per phase! (though I wouldn't recommend you such insane power on a small bike like t...

Is the QS 12kw too much? since they can be over powered, I saw yours had a 3000w one, I'd say if you have the money then go for it, a better motor gives you more margin for evolution and also more reliability. The downside might be weight, I think the 12kw is real heavy. An other good compromize is...

What diameter is your hub motor on your scooter/moped? Mine is 8” on 10” wheel. I can only run 7kw for 15 minutes before the phase wires are heat to 60 celcius. Im thinking of some 0w oil in there or maybe glue on some ugly heat sinks as a last resort. I can achieve 80kph @67v with flux weakening. ...

I'd go with a hub motor, it has the most benefits compared to inboard. -Power isn't a concern unless you want to surpass a 1000cc sport bike. Which, really, doesn't make much sense on open roads if you want my opinion. With a 12kw QS motor, a good controller and a powerful battery you can take off f...

Any more ideas? I'm not sure how your motor is internally wired, but can't you use the electromagnet's force directly to measure deflection? feed power to one side, and the reverse power to the other to get the maximum effect, and of course prevent it to turn somehow. No need for a crazy amount of ...

My questions are: 1. What initial speed should I expect? Never heard of this controller, but if the "260" in the 72260 number refers to the phase amps, then it won't be glorious. If it refers to the battery amps, then it might be pretty nice. So it's hard to answer, you'll need to open the bike and...

Oh, bummer.... I'd say start with aluminum, it'll be very easy for you to manufature and it's a good way to keep it cheap while making a few tests, you can always upgrade to carbon later if aluminum proved to solve your issue.

Finally, the darn thing turned without rubbing. Whew! :thumb: That's awesome news, I'm so happy for you! During those past months your thread is the one that got me checking ES every day for updates, so I'm really super happy to see your motor finally move on its own! Congratulation on your perseve...

Sorry to revive an old thread, but I'm worried about the silicone being too weak. There is a lot of sheer force going through eighteen 1/8" screws. Is there a strong glue for this purpose? Silicon is pretty soft. Something between silicon and jbweld would be perfect. Just us some automotive gasket ...

Can the Max Erpm of the motor be a reason to react in this way?? If got on AlienPower 12090 - (28Magnets/ 14 Pairs) 30000erpm/14 Pairs = 2142 rpm. When its go higher, the motor seemd to cut off..... I think it has to do with this, but I'm not entirely sure because it happens only when releasing the...

That looks totally awesome, really hope it'll work!!

...Okay i was JUST looking at a 3D Printer as well.... I think i will be patient and go this route...thank you sir this is very inspirational :flame: :flame: :flame: <3 Go for it! 3D printer is what motivated me to build all kind of crazy stuff in the first place, its a great tool! I'm building one...

Not sure if this would be accurate since it's possible that the picture doesn't make things look like they should, but the rotor seems relatively straight while the stator looks crooked... asadfad.png My vote would go to a combination of option 1 and option 2, using one big washer on each side while...

-The attraction is going to cancel out nicely only when dead centered and that's never quite going to be the case, the force from the side that's a tiny bit closer will quickly dominate and it will get pulled in until contacting at a guess. Yeah of course it wouldn't be cancelled entirely, but the ...

Well that's bad news. But there's something I'm not sure to understand: the stator is pulled towards the rotor plate by the magnet, but there are two rotor plates, one on each side. So in theory they should both cancel each other's effect, at least most part of it. So how come it doesn't? Did you en...

Thanks for the kind message, much appreciated! :wink: Do you build electric powertrain for a living? Because.... LOL Nope, just a regular dude, my job was in IT, but I just got promoted in engineering last week. I am doubt my ability to try and replicate this, I see a Ninja 250 for sale here but I a...

Overall, it's going to work, and I still have the option of re-winding later. We'll stay on course in the interest of getting this thing to spin! I'm not even sure I can put enough power into it to justify 14 awg. yet, so that remains to be seen. The new battery pack might be good for 1500 watts, b...

I still think you should consider using thinner paralleled wires, that would make your life much easier and leave you more possibilities to experiment with. But nice job anyways, can't wait to see it finished

It's been a while, but finally some updates: I managed to finish my battery box, yay! First thing was to install the insulating aerogel sheet. This thing is very easy to cut with a knife, but it makes a big mess and lots of dust. So, I had this idea of using glue spray all over it. Firt it helped in...

I had considered using a throttle setup like that, but I have (possibly unfounded?) reliability concerns because the stock throttle is not dual cable. These cable throttles are real nice, never had any issue with them, you can go for it. Feeling is great too. I suggest you to use one for the variab...

If you can get the desired number of turns with a single strand then that tends to be the easiest to build and the coils will have more mechanical strength. Never tried it myself, but are you sure? It seems a bit counter intuitive, I would have thought that it would be much harder to bend a thick w...

vagosofron wrote: ↑

Jun 10 2020 3:35pm

Unfortunately i can't find a hub motor in EU that can beat the price of a middrive kit i found that includes a 50a controller.

50A is quite weak.
It won't be thrilling performance

What's your budget for this build?

Hi, First, kudos on that great work, seems well done! I'm not sure to understand what's going on there exactly: that's a power stage that is separated from the actual brains, meaning you can plug any kind of brain you want to control the gate drivers, which, by extension, control the mosfets? Someth...

Any ideas? I've tried about everything I can think of. Never had this problem, but I never tried to stop the calibration process either. Controllers really don't like to be messed with whenever they are doing some stuff like calibration, saving or actively communicating. The first thing I'd tried w...